A surfactant-assisted colloidal chemistry route for the tunable synthesis of various PbS architectural nanostructures catalyzed by Ag nanocrystals seed was reported. The sizes and morphologies of the obtained PbS nanostructures were dependent on the amount of Ag nanocrystals seed and the ratio of Pb to S precursors. By varying the amount of Ag seed, sphere-, cube- and rod-shaped PbS nanostructures were obtained; while the morphologies changed from nanosphere to small nanocube and then to large cubeoctahedral when decreasing the precursors ratios of Pb to S from 5:1 to 2:1 and then to 1:2 with the fixation of the amount of Ag seed. Control of morphology under different conditions has been systematically studied and the mechanism of morphology formation was also primarily discussed.

报道了一种表面活性剂辅助的胶体化学路线，用于由 Ag 纳米晶种子催化的各种 PbS 建筑纳米结构的可调合成。获得的 PbS 纳米结构的尺寸和形态取决于 Ag 纳米晶体种子的量和 Pb 与 S 前体的比例。通过改变银种子的数量，获得了球形、立方体和棒状的 PbS 纳米结构；而当Pb与S的前驱体比例从5：1降低到2：1，然后随着Ag种子量的固定降低到1：2时，形态从纳米球变为小纳米立方体，然后变为大立方体八面体。系统地研究了不同条件下的形态控制，并对形态形成的机理进行了初步探讨。